[users@httpd] It's amazing, apache make Tomcat performance decrease dramatically.

[Zufeng Huang <po...@yahoo.com>]

Hi, all
   
  apache2.2.4+mod_jk+tomcat5.5.15
  
I tried apache ab as the tool to do a benchmark. But the result is amazing.
   
  Test steps:
   
  1, Using a jsp as the target ONE.
  1.1, ab ¨Cn 25000 ¨Cc 1000 URL_via_apache
  Concurrency Level:      1000
  Time taken for tests:   410.105255 seconds
  Complete requests:      25000
   
   
  1.2,ab ¨Cn 25000 ¨Cc 1000 URL_direct_to_tomcat
  Concurrency Level:      1000
  Time taken for tests:   12.297322 seconds
  Complete requests:      25000
   
  2, Using a html page as the target TWO.
  2.1, ab ¨Cn 25000 ¨Cc 1000 URL_via_apache
  Concurrency Level:      1000
  Time taken for tests:   25.655253 seconds
  Complete requests:      25000
   
  2.2, ab ¨Cn 25000 ¨Cc 1000 URL_direct_to_tomcat
  Concurrency Level:      1000
  Time taken for tests:   24.132493 seconds
  Complete requests:      25000
     

  So,,,, this really make me amazing and there are two questions:
   
  1, According to my configurations, apache(2.2.4) has NO advantage
 against tomcat(5.5.15) in processing static content.
   
  2, In processing dynamic content, apache make performance decrease
 dramatically.
   
  It¡¯s the matter of MPM-prefork/worker???
     
  ----------------------------

  FYI: 
  <IfModule prefork.c>
  StartServers 50
  MinSpareServers 50
  MaxSpareServers 100
  ServerLimit 2000
  MaxClients 1500
  MaxRequestsPerChild 0
  </IfModule>
   
   ------------------------------
  maxThreads="1500" minSpareThreads="20" maxSpareThreads="50"
  enableLookups="false" redirectPort="8443" acceptCount="300"